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  <title>Document</title>
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    // const date = new Date()
    // div.innerHTML = date.toLocaleString()
    
    setInterval(function(){
      const date = new Date()
      div.innerHTML = date.toLocaleString()
    },1000)
    // function getMyDate(){
    //   let date = new Date();
    //   let h = date.getHours()
    //   let m = date.getMinutes()
    //   let s = date.getSeconds()
    //   h = h < 10 ? '0' + h : h 
    //   m = m < 10 ? '0' + m : m 
    //   s = s < 10 ? '0' + s : s 
    //   return `今天是:${date.getFullYear()}年${date.getMonth() + 1}月${date.getDate()}日${h}:${m}:${s}`
    // }
    // setInterval(function(){
    //   div.innerHTML = getMyDate()
    // },1000)
  </script>
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